Float Mounting Large Heavy Drawing?

[Foresty_Forest]

I'm float mounting a large drawing on very heavy watercolour paper. What should I use to attach the paper to the backing board?

Incidentally, please could I have advice on the size of gap between moulding and drawing?

Thanks

[Justintime]

I would use the hedgehog technique if you don't want a shadow gap around it. If you do want a shadow gap, then I would mount it to a slightly smaller fallout with reversible hinges and then EVA glue that board to an undermount.

[Justintime]

Size of gap between work and moulding is purely a design aesthetic. What do you think looks best? What does your customer prefer? In my experience, the customer will almost always look to you for design guidance, which they don't always follow but it speaks volumes about your work if you have a preference for a piece. With a large piece I always ask about the future placement of the piece too and if there are any final size considerations.

[JKX]

The amount of space around artwork should be the same as it would be if mounted in a window mount.

If raised ( a “pedestal” float mount) it can cast shadows, which can make the art look off centre if the mount width is too narrow.